I found a collection of various summaries from different magazines over at Japan and decided to translate them. So there are heavy spoilers here.
Television's summary of episode 46:
Ryubee is planning to sacrifice Phillip to Wakana in order for her to become the "Shrine Maiden of the Earth". Shotaro is afraid of Terror's powers. Ryubee is planning to fuse Wakana with the Gaia Impact, which contains all the memories of the earth. The meaning of "Shrine Maiden of the Earth" is actually a living Gaia Memory. This is why a control program, which is Phillip, is needed. He's the only one who can use the Evil Tail.
Bro's summary of 46:
Shotaro is almost possessed by Terror's fear. Phillip has been kidnapped by Ryubee and he assembles the whole Sonozaki family at the dining table.
After that Phillip is able to call Shotaro and tell him that he's becoming a sacrifice. When Kyoko hears this, she decides to steal the Evil Tail from the Sonozaki family.
Episode 47 is called "残されたＵ／フィリップからの依頼" The U Left Behind / A Request from Phillip
Station's summary of the episode:
After the collapse of the Sonozaki family, Phillip asks Shotaro to find Wakana.
Kazu is taking care of Wakana and for the sake of Saeko, he has taken over Ryubee's plans.
TV Life's summary of 47:
Phillip can still sense the existence of Wakana, he begs Shotaro to find her. Kazu becomes the Utopia Dopant and attacks Ryu. Phillip is, for some reason, refusing to transform into Double.
Episode 48 still has no name, but Station has a summary for it.
For some reasons Shotaro's hesitating to become W. Ryu is heavily wounded and the plan to rescue Wakana has failed. On top of that, Kazu is trying to hurt Phillip mentally by attacking people close to him.
